materials hard to process
materials hard to process
难以加工的材料
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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With the continuous application of ultra-hard high speed steel and other materials hard to be machined in tool industry, higher requirements have been put foward to the grinding process for tools.
随着超硬含铝高速钢及其他难加工材料在工具行业的不断应用，对刀具的磨削加工提出了更高的要求。
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